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Dictionary definition for: M
1. (n) the basic unit of length adopted under the Systeme International d''Unites (approximately 1.094 yards)
2. (s) denoting a quantity consisting of 1,000 items or units
3. (n) concentration measured by the number of moles of solute per liter of solvent
4. (n) the cardinal number that is the product of 10 and 100
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